[HQRP] Fwd: [amsat-bb] PSK31 Satellite Uplink on 10m

[Ed Manuel]

A new proposal for a PSK-31 satellite window.  Something to mull over.

Ed





>AMSAT and PSK-31 Enthusiasts:
>
>This is a proposal to allocate 3KHz in the Novice/Tech+ CW portion of the
>10m band for a future PSK-31 Satellite UPLINK.  Since this type of
>satellite operation is not currently covered in the ARRL band plans I am
>laying this on the table for discussion prior to submitting a formal
>frequency coordination request.
>
>For a full description of the PSK-31 Satellite Transponder and its great
>advantages, see:  http://web.usna.navy.mil/~bruninga/psk31uplink.html
>
>Just to have a target frequency, I would suggest that the existing narrow
>28.120 to 28.123 MHz PSK-31 area of activty be included in the uplink. As
>an uplink, it has NO impact on the present users of the band, other than
>possibly inviting additional activity.
>
>The Satellite simply listens to that uplink with an SSB receiver and
>then sends the recoverd audio (with all PSK-31 users in it) down on a
>normal 2m or 70cm FM downlink that can be heard on any FM rig or
>scanner... Because of the FM donwlink, there is no additional Doppler
>added to the signals and only the 10m uplink Doppler (averaging 1 Hz per
>second) is involved.  But since each user viewing the downlink can see
>exactly where his signal is relative to everyone else *as seen by the
>satellite*, doppler tracking is trivial..
>
>Since this satellite will probably be launched in the LOW sunspot cycle, I
>think this is a reasonable use of that band.  It should be noted, that
>Small Wonder Labs produces a crystal controlled PSK-31 Transceiver kit for
>under $90 that any Novice or Tech+ operator could use to get on the
>satellite...  This rig is crystaled up on 28.120 MHz...
>
>If anyone sees any problems with this proposal, let me know before I
>formally submit it through AMSAT to the IARU Satellite Frequency
>Coordinator.
>
>de WB4APR@amsat.org
>
>
>
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